It is said that the blue pond was made by the public work of this river from Mt. Asahi(dake) and Mt.Tokachi(dake).
The river also looked blue like the pond. What is the ingredients that make the water flow blue? The color is from not only the blue sky.
This fence was not there last year, I think. So many tourists was swamping to the pond and the riverside and that is why the fence was made. Again, the pond in the night can be seen at https://www.facebook.com/biei.hokkaidoat https://www.facebook.com/biei.hokkaidoat